php高效分页类代码(1/2)

<script>ec(2);</script>

这个类适用于配合数据库教程查询分页，和数组分页。下面有使用方法。
[php教程]
/*
* 名称: 分页类
* 介绍: 适用于数组分页和配合sql查询的分页
* 作者: idlion || moonfly (id_lion@hotmail.com)
* 创建时间: 2006-02-18
* 最后修改: 2007-05-24
*/

class pagebreak {
private $mtotalrowsnum = 0;   // 总信息行数
private $mcurpagenumber = 1;  // 当前所在页
private $mtotalpagesnum = 1;  // 总页数
private $mquerystring;     // 页面传递的数据(url?后的字符串)
private $mpagerowsnum = 20;  // 每页显示行数
private $mindexbarlength = 5;  // 索引条的页数
private $mindexbar = '';     // 页码索引条
private $mpageinfo = '';     // 分页信息
// 页码索引条样式
private $mnextbutton = "8";
private $mprebutton = "7";
private $mfirstbutton = "9";
private $mlastbutton = ":";
private $mcss教程indexbarcurpage = "font-weight:bold;color:#ff0000";
private $mcssindexbarpage = '';
// 分页信息样式
private $mcsspageinfonumfont = 'color:#ff0000';
private $mcsspageinfofont = '';

// 构造方法
public function __construct(&$rsqlquery, $userpagerowsnum='') {
  if( !is_array($rsqlquery) ) {
   $this->setdbpagebreak($rsqlquery, $userpagerowsnum);
  }
  else {
   $this->setarraypagebreak($rsqlquery, $userpagerowsnum);
  }
}

// 设置数据库型分页
private function setdbpagebreak(&$rsqlquery, $userpagerowsnum='') {
  $this->setdbtotalrowsnum($rsqlquery);
  $this->settotalpagesnum($userpagerowsnum);
  if( $this->mtotalpagesnum > 1 ) {
   $this->setcurpagenumber();
   $this->setsqlquery($rsqlquery);
   $this->setquerystring();
   $this->setindexbar();
   $this->setpageinfo();
  }
}

// 设置数组型分页
private function setarraypagebreak(&$rarray, $userpagerowsnum='', $usertotalrowsnum='') {
  $this->setarraytotalrowsnum($rarray, $usertotalrowsnum);
  $this->settotalpagesnum($userpagerowsnum);
  if( $this->mtotalpagesnum > 1 ) {
   $this->setcurpagenumber();
   $this->setarray($rarray);
   $this->setquerystring();
   $this->setindexbar();
   $this->setpageinfo();
  }
}

// 数据库型计算总行数
private function setdbtotalrowsnum($rsqlquery) {
  $this->mtotalrowsnum = mysql教程_num_rows( mysql_query($rsqlquery) );
}

// 数组型计算总行数
private function setarraytotalrowsnum($array) {
  $this->mtotalrowsnum = count($array);
}

// 计算总页数
private function settotalpagesnum($userpagerowsnum='') {
  if( $userpagerowsnum ) {
   $this->mpagerowsnum = $userpagerowsnum;
  }
  $this->mtotalpagesnum = (int)( floor( ($this->mtotalrowsnum-1)/$this->mpagerowsnum )+1 );
}

// 计算当前页数
private function setcurpagenumber() {
  if( $_get['cur_page'] ) {
   $this->mcurpagenumber = $_get['cur_page'];
  }
}

// 修正sql截取语句
private function setsqlquery(&$rsqlquery) {
  $start_number = ($this->mcurpagenumber-1)*$this->mpagerowsnum;
  $rsqlquery .= " limit ".$start_number.",".$this->mpagerowsnum;
}

// 修正截取后的array
private function setarray(&$rarray) {
  $start_number = ($this->mcurpagenumber-1)*$this->mpagerowsnum;
  $rarray = array_slice($rarray, $start_number, $this->mpagerowsnum);
}

// 修正 $_get 传递数据
private function setquerystring() {
  $query_string = $_server['query_string'];
  if ( $query_string == '' ) {
   $this->mquerystring = "?cur_page=";
  }
  else {
   $this->mquerystring = preg_replace("/&?cur_page=d+/", '', $query_string);
   $this->mquerystring = "?".$this->mquerystring."&cur_page=";
  }
}

// 设置页码索引条
private function getpageindex() {
  if( $this->mtotalpagesnum mindexbarlength ) {
   $first_number = 1;
   $last_number = $this->mtotalpagesnum;
  }
  else {
   $offset = (int)floor($this->mindexbarlength/2);
   if( ($this->mcurpagenumber-$offset)     $first_number = 1;
   }
   elseif( ($this->mcurpagenumber+$offset) > $this->mtotalpagesnum ) {
    $first_number = $this->mtotalpagesnum-$this->mindexbarlength+1;
   }
   else {
    $first_number = $this->mcurpagenumber-$offset;
   }
   $last_number = $first_number+$this->mindexbarlength-1;
  }
  $last_number;
  for( $i=$first_number; $i    if( $this->mcurpagenumber == $i ) {
    $page_index .= "".$i." ";
   }
   else {
    $page_index .= "".$i." ";
   }
  }
  return $page_index;
}

// 设置页码索引条
private function setindexbar() {
  $this->mindexbar = $this->getnavfirstbutton();
  $this->mindexbar .= $this->getnavprebutton();
  $this->mindexbar .= $this->getpageindex();
  $this->mindexbar .= $this->getnavnextbutton();
  $this->mindexbar .= $this->getnavlastbutton();
}

// 得到页码索引条 首页按钮
private function getnavfirstbutton() {
  return "".$this->mfirstbutton." ";
}

// 得到页码索引条 上一页按钮
private function getnavprebutton() {
  if( $this->mcurpagenumber>1 ) {
   $pre_number = $this->mcurpagenumber-1;
  }
  else {
   $pre_number = 1;
  }
  return "".$this->mprebutton." ";
}

// 得到页码索引条 下一页按钮
private function getnavnextbutton() {
  if( $this->mcurpagenumbermtotalpagesnum ) {
   $next_number = $this->mcurpagenumber+1;
  }
  else {
   $next_number = $this->mtotalpagesnum;
  }
  return "".$this->mnextbutton." ";
}

// 得到页码索引条 末页按钮
private function getnavlastbutton() {
  return "".$this->mlastbutton." ";
}

// 设置分页信息
private function setpageinfo() {
  $this->mpageinfo ="";
  $this->mpageinfo .= "共 ".$this->mtotalrowsnum." 条信息 | ";
  $this->mpageinfo .= "".$this->mpagerowsnum." 条/页 | ";
  $this->mpageinfo .= "共 ".$this->mtotalpagesnum." 页 | ";
  $this->mpageinfo .= "第 ".$this->mcurpagenumber." 页";
  $this->mpageinfo .= "";
}

// 取出页码索引条
public function getindexbar() {
  return $this->mindexbar;
}

// 取出分页信息
public function getpageinfo() {
  return $this->mpageinfo;
}

}
?>
[/php]

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